Ingot for the manufacture of com pound m etallic tubes



T. S. VERY.

Patented Oct. 18, 1887.

WVENTUR.

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INGOT FOR THE MANUFACTURE OF COMPOUND METALLIC TUBES. No. 371.719.

W/TNEEEEE;

tirirrsn Srarns 7 Parent Orrrcea THEODORE S. VERY, OF BOSTON, MASSACHUSETTS.

lNGOT FORTE-51E MANUFAOTUREOFCOMPOUND METALLIC TUBES.

SPECIFICATIQN forming part of Letters Patent No. 371,719, dated October 18, 1887.

Application filed June 27, 1887.

To aZZ whom it may concern:

Be it known that I, Tnnonoa'n S. VnnY, of Boston, in the county of Sufi-elk and State of Massachusetts, have invented certain new and useful Improvements in Ingots for the Manul'acture of Compound Metallic Tubes, of which the following is a specification.

invention relates to the manufacture of metallic tubes, and has as its object the construction in an economical and practical 1nannor of compound hollow ingots or blanks from which such tubes may be rolled or formed, which, in addition to being stronger and less liableto breakage than welded tubes, mayhave a smoother finish on the inside, and in. some cases and for some uses be practically noncorrosivcas, for example, in boilers ofstcamengines, ordinary tubes of iron or steel in such cases having to be frequently cleaned and replaced on account of oxidation and acenmnla tions of rust and scale. By my improved process tubes for boilers, axles, shutting, or any other article constructed as a tube or metal may be formed having a wrought-iron lining orinside coating and an outside covering or coating of m'itis, iron orsteel, or vice versa. Compound tubes of brass and copper,or oopperandiron, or ironand brass,oroo1. pcrand steel,orothercompounds or combinations, may be formed in ac cordance with my process, andin like manner tubular ingots may be cast so that the two or more metals composing the same may be intimately and firmly united or welded together. I will now proceed to describe my invcir tion, so that others skilled in the art may understand and practice or use it, reference being made to the accompanying drawing, and to the letters of refer-en cc mark edt hereon,i'orni ing apart of this specification, which drawing shows a vertical section of a mold and its contained castings, illustrating my invention.

In carrying out my invention I take a tube, a, of any desired metal, having thick or thin Walls, as may be required for the purpose for which the compound tube or casting is intended, and after heating it regularly in a proper furnace to a sullicient degree I stand Serial No. 242,638. (No model.)

said tube a in a mold, i), of any form or construction suited to the purpose, and immediately pour around it the molten metal, 0, in tended for the outer coating or covering,which metal 0, being at a higher degree of heat than the tube a, raises the degree of heat of thelattcr to a point effecting a substantial fusion and thoroughly effective welding of the two metals at their meeting line.

If the inner tube a should be thin, so as that it would warp or yield to the pressure of the molten metal, a piece of round iron or steel may be placed in the tube before placing the latter in the mold, which round piece of metal may be withdrawn after casting.

In some instances in practicing my invention I paint or surround the tube with a coating containing a sufficient quantity of fluxborax or other compound containing it-and,

after placing the tube while thus coated in the mold, pour the molten metal around it, as described. After the casting so formed has been finished it may be allowed to cool, and be subsequently heated in order to treat it by rolling, or otherwise treated for the purpose of enlarging, lengthening, or expanding it, as may be desired.

Iilavingthus described myinvention, whatI claim is 1. In the art of manufacturing ingots for compound metallic tubes, the improvement consisting in heating a metallic tube, then placing such heated tube in amold, and finally pouring molten metal in the mold around the tube, whereby the molten metal will be united to the tube, as set forth.

2. In theart of manufacturing ingots for compound metallic tubes, the improvement consisting in coating a metallic tube with a suitable flux, then placing such tube in a mold, and finally pouring molten metal inthe mold around the tube, whereby the molten metal will be united to the tube, as set forth.

3. In the art of manufacturing compound metallic tubes, the improvement consisting in placing a metallic tube in a mold, then pour ing molten metal in the mold around the tube,

and finally rolling or otherwise treating the In testimony whereof I have signed my name article so formed to construct a tube of desired to this specification, in the presence of two sub- :0

dimensions, as set forth. scribing witnesses, this 24th day of June, A.

4. An ingot for the manufacture of a com- D. 1887. 5 pound metallictubeortubecomposed of two or THEODORE S. VERY.

more kinds of metals, said metals being inti- XVitnesses: mately connected or united at their line of ARTHUR W. OROSSLEY, meeting by fusing, as set forth. O. F. BROWN. 

